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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Fri, 02 Oct 2026 15:08:12 +0000</lastBuildDate>
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      <title>CVE-2026-74300 — Bluetooth: hci: validate codec capability element length</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-74300</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Bluetooth: hci: validate codec capability element length&lt;/p&gt;
&lt;p&gt;Read Local Codec Capabilities returns a sequence of capability elements.
Each element starts with a one-byte length followed by that many payload
bytes.&lt;/p&gt;
&lt;p&gt;hci_read_codec_capabilities() checks that the skb contains the length
byte, but then validates only caps-&amp;gt;len against the remaining skb
length.  A malformed controller response with one remaining byte and
caps-&amp;gt;len set to one passes that check even though the element needs two
bytes.  The parser then records a two-byte capability and copies one
byte beyond the advertised response payload into the codec list.&lt;/p&gt;
&lt;p&gt;Validate the full element size, including the length byte, before adding
it to the accumulated capability length.  This preserves all well-formed
capability elements and drops only truncated controller responses.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Bluetooth: hci: validate codec capability element length&lt;/p&gt;
&lt;p&gt;Read Local Codec Capabilities returns a sequence of capability elements.
Each element starts with a one-byte length followed by that many payload
bytes.&lt;/p&gt;
&lt;p&gt;hci_read_codec_capabilities() checks that the skb contains the length
byte, but then validates only caps-&amp;gt;len against the remaining skb
length.  A malformed controller response with one remaining byte and
caps-&amp;gt;len set to one passes that check even though the element needs two
bytes.  The parser then records a two-byte capability and copies one
byte beyond the advertised response payload into the codec list.&lt;/p&gt;
&lt;p&gt;Validate the full element size, including the length byte, before adding
it to the accumulated capability length.  This preserves all well-formed
capability elements and drops only truncated controller responses.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-74300</guid>
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